Fix Whitespace.

[oota-llvm.git] / include / llvm / Support / Compiler.h

diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h
index 1376e4664c204421f9eb44d987452cbbaadfb1df..9ff78173c96b43868e2475caeca4206578431f0c 100644 (file)
--- a/include/llvm/Support/Compiler.h
+++ b/include/llvm/Support/Compiler.h
@@ -15,12 +15,14 @@
 #ifndef LLVM_SUPPORT_COMPILER_H
 #define LLVM_SUPPORT_COMPILER_H
 
-// The VISIBILITY_HIDDEN macro, used for marking classes with the GCC-specific
-// visibility("hidden") attribute.
+/// LLVM_LIBRARY_VISIBILITY - If a class marked with this attribute is linked
+/// into a shared library, then the class should be private to the library and
+/// not accessible from outside it.  Can also be used to mark variables and
+/// functions, making them private to any shared library they are linked into.
 #if (__GNUC__ >= 4) && !defined(__MINGW32__) && !defined(__CYGWIN__)
-#define VISIBILITY_HIDDEN __attribute__ ((visibility("hidden")))
+#define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden")))
 #else
-#define VISIBILITY_HIDDEN
+#define LLVM_LIBRARY_VISIBILITY
 #endif
 
 #if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
@@ -78,10 +80,13 @@
 
 // ALWAYS_INLINE - On compilers where we have a directive to do so, mark a
 // method "always inline" because it is performance sensitive.
-#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
+// GCC 3.4 supported this but is buggy in various cases and produces
+// unimplemented errors, just use it in GCC 4.0 and later.
+#if __GNUC__ > 3
 #define ALWAYS_INLINE __attribute__((always_inline))
+#elif defined(_MSC_VER)
+#define ALWAYS_INLINE __forceinline
 #else
-// TODO: No idea how to do this with MSVC.
 #define ALWAYS_INLINE
 #endif